Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2012 3 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/11/2012   10:36:19   (   0.05,-135.36) (   0.73,-138.28)  334.28                80
 03/12/2012   10:20:14   (   0.05,-135.34) (  -0.29,-133.76)  180.27                80
 03/13/2012   22:39:30   (  -0.05,-135.32) (  -0.88,-139.07)  426.08                80
 03/14/2012   22:23:26   (  -0.05,-135.31) (   0.15,-134.54)   88.18                80
 03/17/2012   10:26:29   (   0.06,-135.24) (   0.05,-135.28)    3.99                80
 03/19/2012   22:27:00   (  -0.06,-135.20) (  -0.24,-136.05)   96.60                80
 03/20/2012   22:10:54   (  -0.06,-135.18) (   0.73,-131.51)  417.32                80
 03/22/2012   10:30:02   (   0.06,-135.13) (   0.43,-136.79)  188.96                80
 03/23/2012   10:13:58   (   0.06,-135.10) (  -0.61,-132.26)  324.64                80